I doubt if the 1871 David Q is right - dates too far out - but the 1915 death looks very possible. This is the one in the Shankill Graveyard book with right father's name. Good to know it is Summers St, which will help to get the death cert from GRONI. This might identify whether it is the right man (e.g. by reporter) and then I would know my gg grandmother was called Ann. This might help me identify a marriage, since they may well have married after 1845.
Irish death certificates do not give name of wife (unless she is the informant). Will list deceased, date & place of death, cause of death, age, marital status, occupation, informant. Parents' names, birth place & date and place of burial are not on the certificate.
Think this is the Quinn headstone in Shankill: "Until the day break. Erected by David Quinn in memory of his father and mother James and Ann Quinn, and other loved ones. Also the above David Quinn who died 22nd May 1915."